They were widely used in x-ray machines, spark-gap radio transmitters, arc lighting and quack medical electrotherapy devices from the 1880s to the 1920s.
en.wikipedia.org The remedies that were channeled often involved the use of unusual electrotherapy, ultraviolet light, diet, massage, gemstones, less mental work and more relaxation in sand on the beach.
en.wikipedia.org Others are electrotherapy, pilates equipment, treatment furniture, pillows and cushions, among others.
thenationonlineng.net The use of electrotherapy to modulate pain is characterized in one of four ways: subsensory-level stimulation, sensory-level stimulation, motor-level stimulation, and noxious-level stimulation.
en.wikipedia.org Bird made efforts to oppose this quackery, and was instrumental in bringing medical electrotherapy into the mainstream.
en.wikipedia.org